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主管单位 中华人民共和国
工业和信息化部
主办单位 中国材料研究学会
哈尔滨工业大学
主编 苑世剑 国际刊号ISSN 1005-0299 国内刊号CN 23-1345/TB

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引用本文:李红斌,房桂干,邓拥军,施英乔,韩善明,焦健,盘爱享.碳纤维纸张电热及温敏性效应研究[J].材料科学与工艺,2024,32(1):1-7.DOI:10.11951/j.issn.1005-0299.20220349.
LI Hongbin,FANG Guigan,DENG Yongjun,SHI Yingqiao,HAN Shanming,JIAO Jian,PAN Aixiang.Study on electric heating and temperature sensitivity of carbon fiber paper[J].Materials Science and Technology,2024,32(1):1-7.DOI:10.11951/j.issn.1005-0299.20220349.
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碳纤维纸张电热及温敏性效应研究
李红斌1,2,3,4,房桂干1,2,3,4,邓拥军1,2,3,4,施英乔1,2,3,4,韩善明1,2,3,4,焦健1,2,3,4,盘爱享1,2,3,4
(1.江苏省生物质能源与材料重点实验室(中国林业科学研究院林产化学工业研究所),南京 210042;2.国家林业局林产化学 工程重点实验室(中国林业科学研究院林产化学工业研究所),南京 210042;3.生物质化学利用国家工程实验室(中国林业 科学研究院林产化学工业研究所),南京 210042;4.林业资源高效加工利用协同创新中心(南京林业大学),南京210037) [HJ0.5mm]
摘要:
碳纤维纸张可作为优良的面状发热材料,若将其作为采暖地板中的电热元件,可实现地板、采暖一体化,具有广阔的市场前景,为避免碳纤维纸张在使用过程中出现安全隐患,需对碳纤维在碳纤维纸张中的电热和负温度系数(NTC)效应的作用机制进行研究。为了探究碳纤维纸张在通电加热条件下电热及电阻随温度变化的规律,采用红外热成像仪、体式显微镜等仪器分析了碳纤维单丝、搭接单丝、平行单丝及碳纤维纸张4种发热单元的电热和温敏效应,结果表明:碳纤维单丝、搭接单丝及碳纤维纸张表面温度变化趋势均随着输入功率的增加呈现线性增加,在单丝平行方向和垂直方向温度均呈GaussAmp方程曲线分布,碳纤维单丝相互距离等于或者小于0.8 cm,即可将两单丝间温度不均匀度控制在1 ℃以内;通电加热初期,发热单元电阻随温升的增加而急剧下降,当碳纤维单丝加载80 mW功率(即单丝温度接近35 ℃),纸张加载2 000 mW功率(即纸张表面温度接近97 ℃)时,电阻值变化趋势趋于稳定,表明碳纤维单丝及碳纤维纸张均具有明显的NTC效应,并且发热单元中搭接单丝的NTC效应和电热效应在碳纤维纸张中起着主导作用,这对于创制适宜的采暖地板发热元件具有积极的指导意义。
关键词:  碳纤维单丝  碳纤维纸  温敏效应  电学特性  电热效应
DOI:10.11951/j.issn.1005-0299.20220349
分类号:TS761.2
文献标识码:A
基金项目:中国林科院林业新技术所基本科研业务费专项(CAFYBB2017SY032).
Study on electric heating and temperature sensitivity of carbon fiber paper
LI Hongbin1,2,3,4, FANG Guigan1,2,3,4, DENG Yongjun1,2,3,4, SHI Yingqiao1,2,3,4, HAN Shanming1,2,3,4, JIAO Jian1,2,3,4, PAN Aixiang1,2,3,4
(1.Key Lab. of Biomass Energy and Material Jiangsu Province (Institute of Chemical Industry of Forestry Products, CAF),Nanjing 210042, China;2.Key Lab. of Forest Chemical Engineering,SFA(Institute of Chemical Industry of Forestry Products,CAF),Nanjing 210042,China; 3.National Engineering Lab.for Biomass Chemical Utilization(Institute of Chemical Industry of Forestry Products, CAF),Nanjing 210042, China;4.Co-Innovation Center of Efficient Processing and Utilization of Forest Resource(Nanjing Forestry University),Nanjing 210037, China)
Abstract:
Carbon fiber paper can be used as an electric heating element in heating floor to realize the integration of floor heating. In order to avoid potential safety hazards in its use, it is necessary to study the mechanism of electrothermal and negative temperature coefficient (NTC) effect of carbon fiber in carbon fiber paper. In order to explore the rule of electrothermal and resistance change with temperature of carbon fiber paper, the thermal and temperature-sensitive effects of carbon fiber monofilaments, lap monofilaments, parallel monofilaments, and carbon fiber paper were analyzed by means of infrared thermal imager, stereo microscope and other instruments. It was found that the surface temperature of carbon fiber monofilaments, lap monofilaments and carbon fiber sheet rised linearly with the increased power, in addition, the temperature of monofilaments presented a good GaussAmp equation curve in length and vertical directions. The temperature change between the monofilaments could be controlled within 1 ℃ by adjusting the fiber monofilaments distance to be equal to or less than 0.8 cm. Moreover, the resistance of the heating element decreased sharply with the increased temperature at the initial heating stage. The resistance change was stable when the carbon fiber monofilaments and paper were loaded with 80 mW and 2 000 mW power, respectively, which indicating that carbon fiber monofilaments and carbon fiber paper had obvious NTC effect. Moreover, the NTC and electrothermal effects of the lap monofilaments in the heating element play a leading role in the carbon fiber paper, which has a positive guiding significance for the preparation of suitable heating element.
Key words:  carbon fiber monofilament  carbon fiber paper  temperature sensibility  electrical properties  electrothermal effect

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